The judge didn't immediately accept Remy's guilty plea to charges of first-degree murder, assault and battery, and violating a restraining order. He faces a sentence of life in prison without parole.

Remy was arrested Aug. 13 after he allegedly pushed Martel into a mirror. He was released on his own recognizance and stabbed Martel on Aug. 15. He also pleaded guilty Tuesday to assaulting a man who tried to help Martel as Remy stabbed her.

The 35-year-old Remy and the 27-year-old Martel had a 5-year-old daughter. Remy is the son of Jerry Remy, a popular Red Sox announcer.